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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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20.59ct Violet Amethyst, Cushion, VVS
Amethyst Product Video (694477)

20.59ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 119.63

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3.23ctw Multicolor Andalusite, Round, VS-SI
Andalusite Product Video (310827)

3.23ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 143.42

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1.64ct Orange Zircon, Round, VVS-VS

1.64ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 39.11

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54.13ct Multicolor Agate Geode, Fancy, Opaque
Agate Geode Product Video (391991)

54.13ct Multicolor Agate Geode, Fancy, Opaque

26.4 x 24 mm

$ 49.42

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0.55ct Yellow Sphalerite, Fancy, SI

0.55ct Yellow Sphalerite, Fancy, SI

6.1 x 4.2 mm

$ 27.39

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1.58ct White Sillimanite Cat'S Eye, Oval, Transparent

1.58ct White Sillimanite Cat'S Eye, Oval, Transparent

5.9 x 5.6 mm

$ 6.29

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4.57ct Yellow Cat'S Eye Opal, Oval, Opaque

4.57ct Yellow Cat'S Eye Opal, Oval, Opaque

12.2 x 9 mm

$ 25.04

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1.50ct Orange Sphalerite, Round, SI-I1
Sphalerite Product Video (691695)

1.50ct Orange Sphalerite, Round, SI-I1

6.5 mm (calibrated)

$ 62.25

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0.96ct Orange Hessonite Garnet, Round, VS-SI
Hessonite Garnet Product Video (524645)

0.96ct Orange Hessonite Garnet, Round, VS-SI

5.3 mm

$ 11.56

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30.74ct Brown Moonstone, Oval, Translucent

30.74ct Brown Moonstone, Oval, Translucent

25 x 18.9 mm

$ 50.51

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7.78ct Turquoise Grandidierite, Cushion, VS-SI
Grandidierite Product Video (472024)

7.78ct Turquoise Grandidierite, Cushion, VS-SI

15.2 x 10.7 mm

$ 1,704.75

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9.29ctw Pink Morganite, Round, Translucent

9.29ctw Pink Morganite, Round, Translucent

10 mm (calibrated)

$ 101.78

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94.13ct Multicolor Jasper, Round, Opaque

94.13ct Multicolor Jasper, Round, Opaque

41.5 mm

$ 54.38

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0.21ctw White Diamond, Round, VVS-VS
Diamond Product Video (565089)

0.21ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 381.55

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6.76ct Turquoise Larimar, Oval, Opaque

6.76ct Turquoise Larimar, Oval, Opaque

14 x 10 mm (calibrated)

$ 87.44

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24.80ctw Brown Tiger'S Eye, Flower Cut, Opaque

24.80ctw Brown Tiger'S Eye, Flower Cut, Opaque

16 x 16 mm (calibrated)

$ 27.17

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1.70ct Blue Kyanite, Round, SI

1.70ct Blue Kyanite, Round, SI

7 mm (calibrated)

$ 46.56

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19.67ct Brown Tiger'S Eye, Baguette, Opaque

19.67ct Brown Tiger'S Eye, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.59

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10.67ct Multicolor Ruby In Fuchsite, Marquise, Translucent

10.67ct Multicolor Ruby In Fuchsite, Marquise, Translucent

28.1 x 13.1 mm

$ 79.85

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1.69ct Orange Sphalerite, Trillion, SI

1.69ct Orange Sphalerite, Trillion, SI

7.3 x 7.1 mm

$ 84.16

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33.05ct Multicolor Pietersite, Oval, Opaque

33.05ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 108.63

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0.87ct Pink Malaya Garnet, Marquise, VS

0.87ct Pink Malaya Garnet, Marquise, VS

8.7 x 4.6 mm

$ 40.03

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18.08ctw Green Aventurine, Pear Shape, Translucent

18.08ctw Green Aventurine, Pear Shape, Translucent

20.7 x 14.4 mm

$ 41.80

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1.06ct Purple Sapphire, Pear Shape, VS
Sapphire Product Video (447772)

1.06ct Purple Sapphire, Pear Shape, VS

8.2 x 5.6 mm

$ 559.00

View Gem
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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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Overall Rating -> 9 star ratings

I think therea's no problem

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Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
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Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
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Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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